Forging machine



Aug. 25, 1931. F. A. HALLECK Q 1,820,188

FORGING MACHINE Filed Sept. 9,1924 2 Sheets-Sheet l Aug. 25, 1931. v F. A. HALLECK FORGING MACHINE 2 Sheets-Sheet -2 n Filed Sept. 9, 1924 l atented Aug. 25, 1931 -"run stares PATENT OFFICE FRANK A. IIALLECK; or MICHIGAN CITY, INDIANA, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A oonronA' oN or MASSACHUSETTS FORGING MACHINE Original application filed m 30,1920, Serial No. 400,121. Patent No. 1,679,129, issued July a1. 1928.

' Divided and this application filed. September 9, 1924. Serial No. 736,795..

This invention relates to forging machines. Ithas for its object to provide an improved forging machine and particularly one adapted for forging drill steels. A further object is to provide improved means for operating upon a hollow drill steel. "Another object is to provide an improved mechanism for reopening or formingthe hollow portion of the hollow drill steel after the same has been forged or resharpened. More specifically the object of the invention is to provide im proved automatic means for controlling the flow of actuating fluid to the hole opening mechanism. I p p In the accompanying drawings I have shown for purposesof illustration one form which my invention may assume in practice. In these drawings,-

Fig. 1 is a' side elevation of a forging machine embodying my improved hole opening mechanism.

Fig. 2 is a front elevation of a forging machine. V

Fig. 3 is-a side elevation, partly in section of a controlling valvem Fig. l is an enlarged fragmentary sectional detail of the improved means controlling the flow of actuating fluid to the'hole opening mechanism.

- In the illustrative form of the invention as disclosed by this application, which is a division of my copending application Ser. No. 100,121'filed July 30, 1920 now issued as Patent No. 1,679,129, I have shown the usual type of drill steel forging machine comprising a base orsupport 1 having a fluid operated swaging motor 2 and an upsetting motor 3, actuating fluid to both of which is controlled by a suitable valve mechanism disposed within a housing or casing i mounted upon the side of the base -1 and form ing a valve chest for said mechanism, a suitable controlling, lever 5' being provided for said controlling valve. Mounted upon the side of the machine adjacent the work clamping jaws 6 and 7 is the improved hole opening mechanism 8' comprising an upwardly extending bracket 9 forming a guide to m} reciprocably carry a hammer type pneumatic motor 10 carrying at 1ts forward end a hole opening punchor pin 11 which is prevented from being driven outwardly as by a suitable tool retainer 11. Projecting rearwardly from the hammer 10 is a hollow stem 12 terminating-in an enlarged valve 13 clearly shown in Fig. 4. A longitudinal passage 141 and transverse passage 15 allow communication between the interior of the hammer motor 10 and a bore 16 within which the stem 12 and valve 13 are disposed. A bushing 17 is disposed in one end of the bore. 16

to form a radial seating surface for the valve 13, said valvebeing seated, as by. a spring 18, vwhen the device is inoperative. A. removable plug 19 permits any desired adjustment or access to the valve mechanism. The bore 16 is formed in a part of the valve housing 4- and communicates with the main controlling valve chamber or valve chest 20 as by a port 21. A; second portcommunicates by way of a passage 22 with a suitable cleansing nozzle 23., It is to be understood that air is at 7 all times supplied to the housing 4: as through suitable passage means.

In the operation of the device when it is desired to reform or open a hole in the drill steel the operator will insert the punch 11 as far within the hole of the steel as possible by suitable manipulation of the steel and thereafter force the steel and motor 10 rearwardly against combined pressure of the spring 18 and thefluid pressure acting on the free end of the valve member 13. When the valve 13 is unseate'd by movement'of, themotor l0 7 fluid will then flow to the motor through the passages 15 V and 14: to actuate the same and due to the hammering action on the pin, 11; Will the operator holds the drill steel in his hand.

WVhen the operation is completed the steel will be removed and the motor will take the.

inoperative position such as shown inFig. 3,

it being so held as before mentioned by the combined action of the spring 18 and the fluid pressure acting on said valve.

poses of illustration and that the invention cause the hole to be properly formed while may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desireto secure by Letters Patent is:

1. In a drill steel punch, a support having a guide, a pressure fluid'operated hammer motor mounted on said guide for sliding movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling the pressure fluid supply to said motor including a valve having a. valve stem projecting outwardly from and secured to said hammer motor and cooperating seat means on said support, said valve being openable by movement of said'hammer motor relative to said guide and adapted to be closed positively when the hammer'motor is moved to its inoperative position.

2. In a drill steel punch, a support, a pressure fluid operated hammer motor mounted for longitudinal movement on said support, a punch pin percussively actuated by said hammer motor,-and valve mechanism for controlling the flow of pressure fluid to said hammer motor including a valve casing carried by said support and having a bore and a valve seat, a valve stem secured to said motor and having an enlarged valve head thereon disposed within said bore and adapted to cooperate with said valve seat, whereby said valve seat and head are positively relatively moved during movement of the hammer motor said stem having a passage therein for conducting fluid from said bore to said hammer motor, said valve head being unseated from said seat to permit flow of fluid to said hammer motor when said punch pin is moved axially by a drill steel placed thereagainst.

3. In a drill steel punch, a support havmg a guide, a pressure fluid operated hammer motor mounted on said guide for reciprocatory longitudinal movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling the supply of pressure fluid for said motor including a valve having a part rigidly carried by said motor and a cooperating valve seat on said support whereby a positive valve closing action may be efl'ected, said valve being openable by movement of said hammer motor relative to said support in one direction.

4. In a drill steel punch, a support having a guide, a pressure fluid operated hammer motor mounted on said support for longitudinal reciprocatory movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism controlling the flow of pressure fluid to said motor including a casing secured to said support and having a valve chamber therein, a

supply port communicating with said chamher and a valve rigidly carried by said hammer motor and extending within said valve chamber, said valve being openable on movement of said hammer motor relative to said support.-

5. In a drill steel punch, asupport having a guide, a pressure fluid operated hammer motor mounted on said support for longitudinal reciprocatory movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling flow of pressure fluid to said hammer motor and comprising an end seating valve and a cooperating valve seat, one of which is carried by said hammer motor and the other carried by said support whereby the valve closing action is effected when the'hammer motor is moved to its inoperative,

position.

6. In a drill steel punch, a support having and said seat mounted on said support, where- 1 by relative movement between said valve and seat occurs on movement of said-motor longitudinally relative to said support.

.7. In a drill steel punch, a support having a guide, a pressure fluid operated pinning tool mounted on said support for reciprocation with respect to said guide, a punch pin actuated by said tool, and valve mechanism for supplying pressure fluid to said tool including a valve chamber separate from said tool and relative to which saidtool is reciprocable and to which ,pressurefluid is supplied and having. a valve seat formed therein, a valve stem projecting from and secured to said tool, and a valve carried by said stem and disposed in said chamber and adapted to cooperate with said valve seat, said valve having an area continuously subjected to pressure fluid in said valve chamber which tends to hold said tool in a single position and to hold said valve closed, and said valve being openable by movement of said tool in one direc tion to move said valve against said opposing pressure. 7 4

8. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon for longitudinal movement relative thereto,'a punch pin percussively actuated by saidhammer motor, and valve mechanism'for controlling the fluid supply for said motor includinga valve secured to said motor and a cooperating valve seat on said support, said valve being openable by longitudinal movement of said motor 7 relative to said guide in one direction.

9. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon for longitudinal movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling the fluid supply for said motor including a valve having a stem secured to the rear end of said motor and a valve chamber in said support having a valve seat, said valve being openable by longitudinal rearward movement of said motor relative to said guide.

10. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon for longitudinal movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling the fluid supply for said motor including a valve having a stem secured to the rear end of said motor, a valve chamber in said support having a valve seat and a spring acting on said valve for urging said valve toward its seated position,.said valve being openable by longitudinal rearward movement of said motor relative to said guide and adapted to be closed positively when the hammer motor is moved to its inoperative position. i

11. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon for longitudinal movement relative thereto, a punch pin percussively actuated by said hammer motor, and valve mechanism'for controlling the fluid supply for said motor including valve casing provided with a fluid chamber and a valve having a stem secured to the rear end of said motor and having a passage therein for conducting fluid from said chamber to said motor, said valve casing being carried on said support and having a valve seat and said valve being openable by longitudinal rearward movement of said motor relative to said guide.

12. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon, said guide engaging said motor centrally of its length and said motor having front and rear end portions projecting from said guide, a punch pin percussively actuated by said hammer motor, and valve mechanism for controlling the fluid supply for said motor including a valve secured to said motor and a cooperating valve seat on said support, said valve being openable by a longitudinal movement of said motor relative to said guide in one direction.

13. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon, a punch pin pcrcussively actuated by said motor, and valve mechanism for controlling the fluid supply for said motor including a valve having a stem secured to and projecting rearwardly from said motor and a cooperating valve seat on said support with which said lng a stem secured to and projecting rearwardly from said motor and a cooperating valve seat on said support with which said valve cooperates, said valve being opened by movement of said hammer motor rearwardly when a drill steel is placed against said punch pin and shoved rearwardly, and said valve automatically closed when the drill steel is removed from engagement with said punch pin.

15. In a drill steel punch, a support having a guide, a pressure fluid actuated hammer motor slidably guided thereon, a punch pin percussively actuated by said motor, and valve mechanism for controlling the fluid supply for said motor including a valve having a stem secured to and projecting rearwardly from said motor and a cooperating valve seat on said support with which said valve operates, said valve being openable to automatically start said motor when a drill steel is shoved inwardly against the punch pin and automatically closed to stop said motor when the drill steel is pulled away from said In testimony whereof I aflix my signature.

FRANK A. HALLE GK. 

